US4658770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supporting structure for rocker arms for engine valves
Assignee: Honda Motor Co Ltd
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Filing: 1985-09-27
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Granted: 1987-04-21
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Expires: 2005-09-27
Abstract
Abstract A supporting structure for rocker arms for engine valves includes an engine having a cylinder head, a valve provided on the cylinder head and adapted for either of intake and exhaust purposes, a valve-operating mechanism for operating the valve, the valve-operating mechanism including a rocker arm abutting on the top of the valve, to thereby operate the valve, and a pivotal structure for pivotably supporting one end of the rocker arm. The pivotal structure comprises a ball-like portion, a spherical concave portion shaped in a form substantially correspondent to the ball-like portion and engaged with the ball-like portion, and an elastic member disposed at an aperture end of the spherical concave portion and adapted to hold the ball-like portion in the spherical concave portion.
Inventors
- 👤 Takahiro Okuyama
- 👤 Susumu Toki
- 👤 Keiji Tanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:42
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/16; F01M; F01M9/00; F01M9/10; F01M9/107
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A supporting structure for rocker arms for engine valves, including: an engine having a cylinder head; a valve provided on said cylinder head and adapted for either of intake and exhaust purposes; a valve-operating mechanism for operating said valve; said valve-operating mechanism including a rocker arm abutting on the top of said valve, to thereby operate said valve; and a pivotal structure for pivotably supporting one end of said rocker arm, wherein said pivotal structure comprises: a ball-like portion; a spherical concave portion shaped in a form substantially correspondent to said ball-like portion and engaged with said ball-like portion; and an elastic member disposed within an aperture end of said spherical concave portion and adapted to hold said ball-like portion is said spherical concave portion.
Claim 2
Dependent Claim
125 words
A supporting structure for rocker arms for engine valves, including: an engine having a cylinder head; a valve provided on said cylinder head and adapted for either of intake and exhaust purposes; a valve-operating mechanism for operating said valve; said valve-operating mechanism including a rocker arm abutting on the top of said valve, to thereby operate said valve; and a pivotal structure for pivotably supporting one end of said rocker arm, wherein said pivotal structure comprises: a ball-like portion; a spherical concave portion shaped in a form substantially correspondent to said ball-like portion and engaged with said ball-like portion; and an elastic member disposed within an aperture end of said spherical concave portion and adapted to hold said ball-like portion is said spherical concave portion.
Claim 3
Dependent Claim
24 words
A supporting structure according to claim 1, wherein: said pivotal structure is interposed between one end of said rocker arm and said cylinder head.
Claim 4
Dependent Claim
42 words
A supporting structure according to claim 1, wherein: said valve-operating mechanism further includes a push rod fastened to one end of said rocker arm; and said pivotal structure is interposed between said one end of said rocker arm and said push rod.
Claim 5
Dependent Claim
23 words
A supporting structure according to claim 1, wherein: said elastic member is shaped in a ring-like form of a substantially U-shaped cross section.
Claim 6
Dependent Claim
24 words
A supporting structure according to claim 1, wherein: said elastic member is made of a synthetic resin having a relatively small coefficient of friction.
Claim 7
Dependent Claim
19 words
A supporting structure according to claim 1, wherein: said elastic member has a form radially inwardly deformed under pressure.
Claim 8
Dependent Claim
23 words
A supporting structure according to claim 2, wherein: said spherical concave portion is formed in a pivot-receiving bolt attached to said cylinder head.
Claim 9
Dependent Claim
24 words
A supporting structure according to claim 7, wherein: said pivot-receiving bolt has a lube path communicating with the inside of said spherical concave portion.
Claim 10
Dependent Claim
25 words
A supporting structure according to claim 2, wherein: said ball-like portion is formed at the end of a screw member attached to said rocker arm.
Claim 11
Dependent Claim
24 words
A supporting structure according to claim 1, wherein: said aperture end of said spherical concave portion is radially inwardly deformed around said elastic member.
Claim 12
Dependent Claim
37 words
A supporting structure according to claim 1, wherein: said spherical concave portion has an annular groove formed near said aperture end; and said elastic member comprises a C shaped clip which is fitted in said annular groove.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |